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bfad_im.c
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1 /*
2  * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
3  * All rights reserved
4  * www.brocade.com
5  *
6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License (GPL) Version 2 as
10  * published by the Free Software Foundation
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * General Public License for more details.
16  */
17 
18 /*
19  * bfad_im.c Linux driver IM module.
20  */
21 
22 #include <linux/export.h>
23 
24 #include "bfad_drv.h"
25 #include "bfad_im.h"
26 #include "bfa_fcs.h"
27 
28 BFA_TRC_FILE(LDRV, IM);
29 
30 DEFINE_IDR(bfad_im_port_index);
31 struct scsi_transport_template *bfad_im_scsi_transport_template;
32 struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
33 static void bfad_im_itnim_work_handler(struct work_struct *work);
34 static int bfad_im_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmnd);
35 static int bfad_im_slave_alloc(struct scsi_device *sdev);
36 static void bfad_im_fc_rport_add(struct bfad_im_port_s *im_port,
37  struct bfad_itnim_s *itnim);
38 
39 void
40 bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
41  enum bfi_ioim_status io_status, u8 scsi_status,
42  int sns_len, u8 *sns_info, s32 residue)
43 {
44  struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
45  struct bfad_s *bfad = drv;
46  struct bfad_itnim_data_s *itnim_data;
47  struct bfad_itnim_s *itnim;
48  u8 host_status = DID_OK;
49 
50  switch (io_status) {
51  case BFI_IOIM_STS_OK:
52  bfa_trc(bfad, scsi_status);
53  scsi_set_resid(cmnd, 0);
54 
55  if (sns_len > 0) {
56  bfa_trc(bfad, sns_len);
57  if (sns_len > SCSI_SENSE_BUFFERSIZE)
58  sns_len = SCSI_SENSE_BUFFERSIZE;
59  memcpy(cmnd->sense_buffer, sns_info, sns_len);
60  }
61 
62  if (residue > 0) {
63  bfa_trc(bfad, residue);
64  scsi_set_resid(cmnd, residue);
65  if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
66  (scsi_bufflen(cmnd) - residue) <
67  cmnd->underflow) {
68  bfa_trc(bfad, 0);
69  host_status = DID_ERROR;
70  }
71  }
72  cmnd->result = ScsiResult(host_status, scsi_status);
73 
74  break;
75 
76  case BFI_IOIM_STS_ABORTED:
77  case BFI_IOIM_STS_TIMEDOUT:
78  case BFI_IOIM_STS_PATHTOV:
79  default:
80  host_status = DID_ERROR;
81  cmnd->result = ScsiResult(host_status, 0);
82  }
83 
84  /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
85  if (cmnd->device->host != NULL)
86  scsi_dma_unmap(cmnd);
87 
88  cmnd->host_scribble = NULL;
89  bfa_trc(bfad, cmnd->result);
90 
91  itnim_data = cmnd->device->hostdata;
92  if (itnim_data) {
93  itnim = itnim_data->itnim;
94  if (!cmnd->result && itnim &&
95  (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
96  /* Queue depth adjustment for good status completion */
97  bfad_ramp_up_qdepth(itnim, cmnd->device);
98  } else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
99  /* qfull handling */
100  bfad_handle_qfull(itnim, cmnd->device);
101  }
102  }
103 
104  cmnd->scsi_done(cmnd);
105 }
106 
107 void
108 bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
109 {
110  struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
111  struct bfad_itnim_data_s *itnim_data;
112  struct bfad_itnim_s *itnim;
113 
114  cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
115 
116  /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
117  if (cmnd->device->host != NULL)
118  scsi_dma_unmap(cmnd);
119 
120  cmnd->host_scribble = NULL;
121 
122  /* Queue depth adjustment */
123  if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
124  itnim_data = cmnd->device->hostdata;
125  if (itnim_data) {
126  itnim = itnim_data->itnim;
127  if (itnim)
128  bfad_ramp_up_qdepth(itnim, cmnd->device);
129  }
130  }
131 
132  cmnd->scsi_done(cmnd);
133 }
134 
135 void
136 bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
137 {
138  struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
139  struct bfad_s *bfad = drv;
140 
141  cmnd->result = ScsiResult(DID_ERROR, 0);
142 
143  /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
144  if (cmnd->device->host != NULL)
145  scsi_dma_unmap(cmnd);
146 
147  bfa_trc(bfad, cmnd->result);
148  cmnd->host_scribble = NULL;
149 }
150 
151 void
152 bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
153  enum bfi_tskim_status tsk_status)
154 {
155  struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
156  wait_queue_head_t *wq;
157 
158  cmnd->SCp.Status |= tsk_status << 1;
159  set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
160  wq = (wait_queue_head_t *) cmnd->SCp.ptr;
161  cmnd->SCp.ptr = NULL;
162 
163  if (wq)
164  wake_up(wq);
165 }
166 
167 /*
168  * Scsi_Host_template SCSI host template
169  */
170 /*
171  * Scsi_Host template entry, returns BFAD PCI info.
172  */
173 static const char *
174 bfad_im_info(struct Scsi_Host *shost)
175 {
176  static char bfa_buf[256];
177  struct bfad_im_port_s *im_port =
178  (struct bfad_im_port_s *) shost->hostdata[0];
179  struct bfad_s *bfad = im_port->bfad;
180 
181  memset(bfa_buf, 0, sizeof(bfa_buf));
182  snprintf(bfa_buf, sizeof(bfa_buf),
183  "Brocade FC/FCOE Adapter, " "hwpath: %s driver: %s",
184  bfad->pci_name, BFAD_DRIVER_VERSION);
185 
186  return bfa_buf;
187 }
188 
189 /*
190  * Scsi_Host template entry, aborts the specified SCSI command.
191  *
192  * Returns: SUCCESS or FAILED.
193  */
194 static int
195 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
196 {
197  struct Scsi_Host *shost = cmnd->device->host;
198  struct bfad_im_port_s *im_port =
199  (struct bfad_im_port_s *) shost->hostdata[0];
200  struct bfad_s *bfad = im_port->bfad;
201  struct bfa_ioim_s *hal_io;
202  unsigned long flags;
203  u32 timeout;
204  int rc = FAILED;
205 
206  spin_lock_irqsave(&bfad->bfad_lock, flags);
207  hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
208  if (!hal_io) {
209  /* IO has been completed, retrun success */
210  rc = SUCCESS;
211  goto out;
212  }
213  if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
214  rc = FAILED;
215  goto out;
216  }
217 
218  bfa_trc(bfad, hal_io->iotag);
219  BFA_LOG(KERN_INFO, bfad, bfa_log_level,
220  "scsi%d: abort cmnd %p iotag %x\n",
221  im_port->shost->host_no, cmnd, hal_io->iotag);
222  (void) bfa_ioim_abort(hal_io);
223  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
224 
225  /* Need to wait until the command get aborted */
226  timeout = 10;
227  while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
228  set_current_state(TASK_UNINTERRUPTIBLE);
229  schedule_timeout(timeout);
230  if (timeout < 4 * HZ)
231  timeout *= 2;
232  }
233 
234  cmnd->scsi_done(cmnd);
235  bfa_trc(bfad, hal_io->iotag);
236  BFA_LOG(KERN_INFO, bfad, bfa_log_level,
237  "scsi%d: complete abort 0x%p iotag 0x%x\n",
238  im_port->shost->host_no, cmnd, hal_io->iotag);
239  return SUCCESS;
240 out:
241  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
242  return rc;
243 }
244 
245 static bfa_status_t
246 bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
247  struct bfad_itnim_s *itnim)
248 {
249  struct bfa_tskim_s *tskim;
250  struct bfa_itnim_s *bfa_itnim;
251  bfa_status_t rc = BFA_STATUS_OK;
252  struct scsi_lun scsilun;
253 
254  tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
255  if (!tskim) {
256  BFA_LOG(KERN_ERR, bfad, bfa_log_level,
257  "target reset, fail to allocate tskim\n");
258  rc = BFA_STATUS_FAILED;
259  goto out;
260  }
261 
262  /*
263  * Set host_scribble to NULL to avoid aborting a task command if
264  * happens.
265  */
266  cmnd->host_scribble = NULL;
267  cmnd->SCp.Status = 0;
268  bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
269  memset(&scsilun, 0, sizeof(scsilun));
270  bfa_tskim_start(tskim, bfa_itnim, scsilun,
271  FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
272 out:
273  return rc;
274 }
275 
276 /*
277  * Scsi_Host template entry, resets a LUN and abort its all commands.
278  *
279  * Returns: SUCCESS or FAILED.
280  *
281  */
282 static int
283 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
284 {
285  struct Scsi_Host *shost = cmnd->device->host;
286  struct bfad_im_port_s *im_port =
287  (struct bfad_im_port_s *) shost->hostdata[0];
288  struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
289  struct bfad_s *bfad = im_port->bfad;
290  struct bfa_tskim_s *tskim;
291  struct bfad_itnim_s *itnim;
292  struct bfa_itnim_s *bfa_itnim;
293  DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
294  int rc = SUCCESS;
295  unsigned long flags;
296  enum bfi_tskim_status task_status;
297  struct scsi_lun scsilun;
298 
299  spin_lock_irqsave(&bfad->bfad_lock, flags);
300  itnim = itnim_data->itnim;
301  if (!itnim) {
302  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
303  rc = FAILED;
304  goto out;
305  }
306 
307  tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
308  if (!tskim) {
309  BFA_LOG(KERN_ERR, bfad, bfa_log_level,
310  "LUN reset, fail to allocate tskim");
311  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
312  rc = FAILED;
313  goto out;
314  }
315 
316  /*
317  * Set host_scribble to NULL to avoid aborting a task command
318  * if happens.
319  */
320  cmnd->host_scribble = NULL;
321  cmnd->SCp.ptr = (char *)&wq;
322  cmnd->SCp.Status = 0;
323  bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
324  int_to_scsilun(cmnd->device->lun, &scsilun);
325  bfa_tskim_start(tskim, bfa_itnim, scsilun,
326  FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
327  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
328 
329  wait_event(wq, test_bit(IO_DONE_BIT,
330  (unsigned long *)&cmnd->SCp.Status));
331 
332  task_status = cmnd->SCp.Status >> 1;
333  if (task_status != BFI_TSKIM_STS_OK) {
334  BFA_LOG(KERN_ERR, bfad, bfa_log_level,
335  "LUN reset failure, status: %d\n", task_status);
336  rc = FAILED;
337  }
338 
339 out:
340  return rc;
341 }
342 
343 /*
344  * Scsi_Host template entry, resets the bus and abort all commands.
345  */
346 static int
347 bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
348 {
349  struct Scsi_Host *shost = cmnd->device->host;
350  struct bfad_im_port_s *im_port =
351  (struct bfad_im_port_s *) shost->hostdata[0];
352  struct bfad_s *bfad = im_port->bfad;
353  struct bfad_itnim_s *itnim;
354  unsigned long flags;
355  u32 i, rc, err_cnt = 0;
356  DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
357  enum bfi_tskim_status task_status;
358 
359  spin_lock_irqsave(&bfad->bfad_lock, flags);
360  for (i = 0; i < MAX_FCP_TARGET; i++) {
361  itnim = bfad_get_itnim(im_port, i);
362  if (itnim) {
363  cmnd->SCp.ptr = (char *)&wq;
364  rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
365  if (rc != BFA_STATUS_OK) {
366  err_cnt++;
367  continue;
368  }
369 
370  /* wait target reset to complete */
371  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
372  wait_event(wq, test_bit(IO_DONE_BIT,
373  (unsigned long *)&cmnd->SCp.Status));
374  spin_lock_irqsave(&bfad->bfad_lock, flags);
375 
376  task_status = cmnd->SCp.Status >> 1;
377  if (task_status != BFI_TSKIM_STS_OK) {
378  BFA_LOG(KERN_ERR, bfad, bfa_log_level,
379  "target reset failure,"
380  " status: %d\n", task_status);
381  err_cnt++;
382  }
383  }
384  }
385  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
386 
387  if (err_cnt)
388  return FAILED;
389 
390  return SUCCESS;
391 }
392 
393 /*
394  * Scsi_Host template entry slave_destroy.
395  */
396 static void
397 bfad_im_slave_destroy(struct scsi_device *sdev)
398 {
399  sdev->hostdata = NULL;
400  return;
401 }
402 
403 /*
404  * BFA FCS itnim callbacks
405  */
406 
407 /*
408  * BFA FCS itnim alloc callback, after successful PRLI
409  * Context: Interrupt
410  */
411 void
412 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
413  struct bfad_itnim_s **itnim_drv)
414 {
415  *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
416  if (*itnim_drv == NULL)
417  return;
418 
419  (*itnim_drv)->im = bfad->im;
420  *itnim = &(*itnim_drv)->fcs_itnim;
421  (*itnim_drv)->state = ITNIM_STATE_NONE;
422 
423  /*
424  * Initiaze the itnim_work
425  */
426  INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
427  bfad->bfad_flags |= BFAD_RPORT_ONLINE;
428 }
429 
430 /*
431  * BFA FCS itnim free callback.
432  * Context: Interrupt. bfad_lock is held
433  */
434 void
435 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
436 {
437  struct bfad_port_s *port;
438  wwn_t wwpn;
439  u32 fcid;
440  char wwpn_str[32], fcid_str[16];
441  struct bfad_im_s *im = itnim_drv->im;
442 
443  /* online to free state transtion should not happen */
444  WARN_ON(itnim_drv->state == ITNIM_STATE_ONLINE);
445 
446  itnim_drv->queue_work = 1;
447  /* offline request is not yet done, use the same request to free */
448  if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
449  itnim_drv->queue_work = 0;
450 
451  itnim_drv->state = ITNIM_STATE_FREE;
452  port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
453  itnim_drv->im_port = port->im_port;
454  wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
455  fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
456  wwn2str(wwpn_str, wwpn);
457  fcid2str(fcid_str, fcid);
458  BFA_LOG(KERN_INFO, bfad, bfa_log_level,
459  "ITNIM FREE scsi%d: FCID: %s WWPN: %s\n",
460  port->im_port->shost->host_no,
461  fcid_str, wwpn_str);
462 
463  /* ITNIM processing */
464  if (itnim_drv->queue_work)
465  queue_work(im->drv_workq, &itnim_drv->itnim_work);
466 }
467 
468 /*
469  * BFA FCS itnim online callback.
470  * Context: Interrupt. bfad_lock is held
471  */
472 void
473 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
474 {
475  struct bfad_port_s *port;
476  struct bfad_im_s *im = itnim_drv->im;
477 
478  itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
479  port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
480  itnim_drv->state = ITNIM_STATE_ONLINE;
481  itnim_drv->queue_work = 1;
482  itnim_drv->im_port = port->im_port;
483 
484  /* ITNIM processing */
485  if (itnim_drv->queue_work)
486  queue_work(im->drv_workq, &itnim_drv->itnim_work);
487 }
488 
489 /*
490  * BFA FCS itnim offline callback.
491  * Context: Interrupt. bfad_lock is held
492  */
493 void
494 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
495 {
496  struct bfad_port_s *port;
497  struct bfad_s *bfad;
498  struct bfad_im_s *im = itnim_drv->im;
499 
500  port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
501  bfad = port->bfad;
502  if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
503  (port->flags & BFAD_PORT_DELETE)) {
504  itnim_drv->state = ITNIM_STATE_OFFLINE;
505  return;
506  }
507  itnim_drv->im_port = port->im_port;
508  itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
509  itnim_drv->queue_work = 1;
510 
511  /* ITNIM processing */
512  if (itnim_drv->queue_work)
513  queue_work(im->drv_workq, &itnim_drv->itnim_work);
514 }
515 
516 /*
517  * Allocate a Scsi_Host for a port.
518  */
519 int
520 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
521  struct device *dev)
522 {
523  int error = 1;
524 
525  mutex_lock(&bfad_mutex);
526  if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
527  mutex_unlock(&bfad_mutex);
528  printk(KERN_WARNING "idr_pre_get failure\n");
529  goto out;
530  }
531 
532  error = idr_get_new(&bfad_im_port_index, im_port,
533  &im_port->idr_id);
534  if (error) {
535  mutex_unlock(&bfad_mutex);
536  printk(KERN_WARNING "idr_get_new failure\n");
537  goto out;
538  }
539 
540  mutex_unlock(&bfad_mutex);
541 
542  im_port->shost = bfad_scsi_host_alloc(im_port, bfad);
543  if (!im_port->shost) {
544  error = 1;
545  goto out_free_idr;
546  }
547 
548  im_port->shost->hostdata[0] = (unsigned long)im_port;
549  im_port->shost->unique_id = im_port->idr_id;
550  im_port->shost->this_id = -1;
551  im_port->shost->max_id = MAX_FCP_TARGET;
552  im_port->shost->max_lun = MAX_FCP_LUN;
553  im_port->shost->max_cmd_len = 16;
554  im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
555  if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
556  im_port->shost->transportt = bfad_im_scsi_transport_template;
557  else
558  im_port->shost->transportt =
559  bfad_im_scsi_vport_transport_template;
560 
561  error = scsi_add_host_with_dma(im_port->shost, dev, &bfad->pcidev->dev);
562  if (error) {
563  printk(KERN_WARNING "scsi_add_host failure %d\n", error);
564  goto out_fc_rel;
565  }
566 
567  return 0;
568 
569 out_fc_rel:
570  scsi_host_put(im_port->shost);
571  im_port->shost = NULL;
572 out_free_idr:
573  mutex_lock(&bfad_mutex);
574  idr_remove(&bfad_im_port_index, im_port->idr_id);
575  mutex_unlock(&bfad_mutex);
576 out:
577  return error;
578 }
579 
580 void
581 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
582 {
583  bfa_trc(bfad, bfad->inst_no);
584  BFA_LOG(KERN_INFO, bfad, bfa_log_level, "Free scsi%d\n",
585  im_port->shost->host_no);
586 
587  fc_remove_host(im_port->shost);
588 
589  scsi_remove_host(im_port->shost);
590  scsi_host_put(im_port->shost);
591 
592  mutex_lock(&bfad_mutex);
593  idr_remove(&bfad_im_port_index, im_port->idr_id);
594  mutex_unlock(&bfad_mutex);
595 }
596 
597 static void
598 bfad_im_port_delete_handler(struct work_struct *work)
599 {
600  struct bfad_im_port_s *im_port =
601  container_of(work, struct bfad_im_port_s, port_delete_work);
602 
603  if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
604  im_port->flags |= BFAD_PORT_DELETE;
605  fc_vport_terminate(im_port->fc_vport);
606  }
607 }
608 
609 bfa_status_t
610 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
611 {
612  int rc = BFA_STATUS_OK;
613  struct bfad_im_port_s *im_port;
614 
615  im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
616  if (im_port == NULL) {
617  rc = BFA_STATUS_ENOMEM;
618  goto ext;
619  }
620  port->im_port = im_port;
621  im_port->port = port;
622  im_port->bfad = bfad;
623 
624  INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
625  INIT_LIST_HEAD(&im_port->itnim_mapped_list);
626  INIT_LIST_HEAD(&im_port->binding_list);
627 
628 ext:
629  return rc;
630 }
631 
632 void
633 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
634 {
635  struct bfad_im_port_s *im_port = port->im_port;
636 
637  queue_work(bfad->im->drv_workq,
638  &im_port->port_delete_work);
639 }
640 
641 void
642 bfad_im_port_clean(struct bfad_im_port_s *im_port)
643 {
644  struct bfad_fcp_binding *bp, *bp_new;
645  unsigned long flags;
646  struct bfad_s *bfad = im_port->bfad;
647 
648  spin_lock_irqsave(&bfad->bfad_lock, flags);
649  list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
650  list_entry) {
651  list_del(&bp->list_entry);
652  kfree(bp);
653  }
654 
655  /* the itnim_mapped_list must be empty at this time */
656  WARN_ON(!list_empty(&im_port->itnim_mapped_list));
657 
658  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
659 }
660 
661 static void bfad_aen_im_notify_handler(struct work_struct *work)
662 {
663  struct bfad_im_s *im =
664  container_of(work, struct bfad_im_s, aen_im_notify_work);
665  struct bfa_aen_entry_s *aen_entry;
666  struct bfad_s *bfad = im->bfad;
667  struct Scsi_Host *shost = bfad->pport.im_port->shost;
668  void *event_data;
669  unsigned long flags;
670 
671  while (!list_empty(&bfad->active_aen_q)) {
672  spin_lock_irqsave(&bfad->bfad_aen_spinlock, flags);
673  bfa_q_deq(&bfad->active_aen_q, &aen_entry);
674  spin_unlock_irqrestore(&bfad->bfad_aen_spinlock, flags);
675  event_data = (char *)aen_entry + sizeof(struct list_head);
676  fc_host_post_vendor_event(shost, fc_get_event_number(),
677  sizeof(struct bfa_aen_entry_s) -
678  sizeof(struct list_head),
679  (char *)event_data, BFAD_NL_VENDOR_ID);
680  spin_lock_irqsave(&bfad->bfad_aen_spinlock, flags);
681  list_add_tail(&aen_entry->qe, &bfad->free_aen_q);
682  spin_unlock_irqrestore(&bfad->bfad_aen_spinlock, flags);
683  }
684 }
685 
686 bfa_status_t
687 bfad_im_probe(struct bfad_s *bfad)
688 {
689  struct bfad_im_s *im;
690 
691  im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
692  if (im == NULL)
693  return BFA_STATUS_ENOMEM;
694 
695  bfad->im = im;
696  im->bfad = bfad;
697 
698  if (bfad_thread_workq(bfad) != BFA_STATUS_OK) {
699  kfree(im);
700  return BFA_STATUS_FAILED;
701  }
702 
703  INIT_WORK(&im->aen_im_notify_work, bfad_aen_im_notify_handler);
704  return BFA_STATUS_OK;
705 }
706 
707 void
708 bfad_im_probe_undo(struct bfad_s *bfad)
709 {
710  if (bfad->im) {
711  bfad_destroy_workq(bfad->im);
712  kfree(bfad->im);
713  bfad->im = NULL;
714  }
715 }
716 
717 struct Scsi_Host *
718 bfad_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
719 {
720  struct scsi_host_template *sht;
721 
722  if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
723  sht = &bfad_im_scsi_host_template;
724  else
725  sht = &bfad_im_vport_template;
726 
727  if (max_xfer_size != BFAD_MAX_SECTORS >> 1)
728  sht->max_sectors = max_xfer_size << 1;
729 
730  sht->sg_tablesize = bfad->cfg_data.io_max_sge;
731 
732  return scsi_host_alloc(sht, sizeof(unsigned long));
733 }
734 
735 void
736 bfad_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
737 {
738  if (!(im_port->flags & BFAD_PORT_DELETE))
739  flush_workqueue(bfad->im->drv_workq);
740  bfad_im_scsi_host_free(im_port->bfad, im_port);
741  bfad_im_port_clean(im_port);
742  kfree(im_port);
743 }
744 
745 void
746 bfad_destroy_workq(struct bfad_im_s *im)
747 {
748  if (im && im->drv_workq) {
749  flush_workqueue(im->drv_workq);
750  destroy_workqueue(im->drv_workq);
751  im->drv_workq = NULL;
752  }
753 }
754 
755 bfa_status_t
756 bfad_thread_workq(struct bfad_s *bfad)
757 {
758  struct bfad_im_s *im = bfad->im;
759 
760  bfa_trc(bfad, 0);
761  snprintf(im->drv_workq_name, KOBJ_NAME_LEN, "bfad_wq_%d",
762  bfad->inst_no);
763  im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
764  if (!im->drv_workq)
765  return BFA_STATUS_FAILED;
766 
767  return BFA_STATUS_OK;
768 }
769 
770 /*
771  * Scsi_Host template entry.
772  *
773  * Description:
774  * OS entry point to adjust the queue_depths on a per-device basis.
775  * Called once per device during the bus scan.
776  * Return non-zero if fails.
777  */
778 static int
779 bfad_im_slave_configure(struct scsi_device *sdev)
780 {
781  if (sdev->tagged_supported)
782  scsi_activate_tcq(sdev, bfa_lun_queue_depth);
783  else
784  scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
785 
786  return 0;
787 }
788 
789 struct scsi_host_template bfad_im_scsi_host_template = {
790  .module = THIS_MODULE,
791  .name = BFAD_DRIVER_NAME,
792  .info = bfad_im_info,
793  .queuecommand = bfad_im_queuecommand,
794  .eh_abort_handler = bfad_im_abort_handler,
795  .eh_device_reset_handler = bfad_im_reset_lun_handler,
796  .eh_bus_reset_handler = bfad_im_reset_bus_handler,
797 
798  .slave_alloc = bfad_im_slave_alloc,
799  .slave_configure = bfad_im_slave_configure,
800  .slave_destroy = bfad_im_slave_destroy,
801 
802  .this_id = -1,
803  .sg_tablesize = BFAD_IO_MAX_SGE,
804  .cmd_per_lun = 3,
805  .use_clustering = ENABLE_CLUSTERING,
806  .shost_attrs = bfad_im_host_attrs,
807  .max_sectors = BFAD_MAX_SECTORS,
808  .vendor_id = BFA_PCI_VENDOR_ID_BROCADE,
809 };
810 
811 struct scsi_host_template bfad_im_vport_template = {
812  .module = THIS_MODULE,
813  .name = BFAD_DRIVER_NAME,
814  .info = bfad_im_info,
815  .queuecommand = bfad_im_queuecommand,
816  .eh_abort_handler = bfad_im_abort_handler,
817  .eh_device_reset_handler = bfad_im_reset_lun_handler,
818  .eh_bus_reset_handler = bfad_im_reset_bus_handler,
819 
820  .slave_alloc = bfad_im_slave_alloc,
821  .slave_configure = bfad_im_slave_configure,
822  .slave_destroy = bfad_im_slave_destroy,
823 
824  .this_id = -1,
825  .sg_tablesize = BFAD_IO_MAX_SGE,
826  .cmd_per_lun = 3,
827  .use_clustering = ENABLE_CLUSTERING,
828  .shost_attrs = bfad_im_vport_attrs,
829  .max_sectors = BFAD_MAX_SECTORS,
830 };
831 
832 bfa_status_t
833 bfad_im_module_init(void)
834 {
835  bfad_im_scsi_transport_template =
836  fc_attach_transport(&bfad_im_fc_function_template);
837  if (!bfad_im_scsi_transport_template)
838  return BFA_STATUS_ENOMEM;
839 
840  bfad_im_scsi_vport_transport_template =
841  fc_attach_transport(&bfad_im_vport_fc_function_template);
842  if (!bfad_im_scsi_vport_transport_template) {
843  fc_release_transport(bfad_im_scsi_transport_template);
844  return BFA_STATUS_ENOMEM;
845  }
846 
847  return BFA_STATUS_OK;
848 }
849 
850 void
851 bfad_im_module_exit(void)
852 {
853  if (bfad_im_scsi_transport_template)
854  fc_release_transport(bfad_im_scsi_transport_template);
855 
856  if (bfad_im_scsi_vport_transport_template)
857  fc_release_transport(bfad_im_scsi_vport_transport_template);
858 }
859 
860 void
861 bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
862 {
863  struct scsi_device *tmp_sdev;
864 
865  if (((jiffies - itnim->last_ramp_up_time) >
866  BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
867  ((jiffies - itnim->last_queue_full_time) >
868  BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
869  shost_for_each_device(tmp_sdev, sdev->host) {
870  if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
871  if (tmp_sdev->id != sdev->id)
872  continue;
873  if (tmp_sdev->ordered_tags)
874  scsi_adjust_queue_depth(tmp_sdev,
875  MSG_ORDERED_TAG,
876  tmp_sdev->queue_depth + 1);
877  else
878  scsi_adjust_queue_depth(tmp_sdev,
879  MSG_SIMPLE_TAG,
880  tmp_sdev->queue_depth + 1);
881 
882  itnim->last_ramp_up_time = jiffies;
883  }
884  }
885  }
886 }
887 
888 void
889 bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
890 {
891  struct scsi_device *tmp_sdev;
892 
893  itnim->last_queue_full_time = jiffies;
894 
895  shost_for_each_device(tmp_sdev, sdev->host) {
896  if (tmp_sdev->id != sdev->id)
897  continue;
898  scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
899  }
900 }
901 
902 struct bfad_itnim_s *
903 bfad_get_itnim(struct bfad_im_port_s *im_port, int id)
904 {
905  struct bfad_itnim_s *itnim = NULL;
906 
907  /* Search the mapped list for this target ID */
908  list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
909  if (id == itnim->scsi_tgt_id)
910  return itnim;
911  }
912 
913  return NULL;
914 }
915 
916 /*
917  * Function is invoked from the SCSI Host Template slave_alloc() entry point.
918  * Has the logic to query the LUN Mask database to check if this LUN needs to
919  * be made visible to the SCSI mid-layer or not.
920  *
921  * Returns BFA_STATUS_OK if this LUN needs to be added to the OS stack.
922  * Returns -ENXIO to notify SCSI mid-layer to not add this LUN to the OS stack.
923  */
924 static int
925 bfad_im_check_if_make_lun_visible(struct scsi_device *sdev,
926  struct fc_rport *rport)
927 {
928  struct bfad_itnim_data_s *itnim_data =
929  (struct bfad_itnim_data_s *) rport->dd_data;
930  struct bfa_s *bfa = itnim_data->itnim->bfa_itnim->bfa;
931  struct bfa_rport_s *bfa_rport = itnim_data->itnim->bfa_itnim->rport;
932  struct bfa_lun_mask_s *lun_list = bfa_get_lun_mask_list(bfa);
933  int i = 0, ret = -ENXIO;
934 
935  for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
936  if (lun_list[i].state == BFA_IOIM_LUN_MASK_ACTIVE &&
937  scsilun_to_int(&lun_list[i].lun) == sdev->lun &&
938  lun_list[i].rp_tag == bfa_rport->rport_tag &&
939  lun_list[i].lp_tag == (u8)bfa_rport->rport_info.lp_tag) {
940  ret = BFA_STATUS_OK;
941  break;
942  }
943  }
944  return ret;
945 }
946 
947 /*
948  * Scsi_Host template entry slave_alloc
949  */
950 static int
951 bfad_im_slave_alloc(struct scsi_device *sdev)
952 {
953  struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
954  struct bfad_itnim_data_s *itnim_data =
955  (struct bfad_itnim_data_s *) rport->dd_data;
956  struct bfa_s *bfa = itnim_data->itnim->bfa_itnim->bfa;
957 
958  if (!rport || fc_remote_port_chkready(rport))
959  return -ENXIO;
960 
961  if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_ENABLED) {
962  /*
963  * We should not mask LUN 0 - since this will translate
964  * to no LUN / TARGET for SCSI ml resulting no scan.
965  */
966  if (sdev->lun == 0) {
967  sdev->sdev_bflags |= BLIST_NOREPORTLUN |
968  BLIST_SPARSELUN;
969  goto done;
970  }
971 
972  /*
973  * Query LUN Mask configuration - to expose this LUN
974  * to the SCSI mid-layer or to mask it.
975  */
976  if (bfad_im_check_if_make_lun_visible(sdev, rport) !=
977  BFA_STATUS_OK)
978  return -ENXIO;
979  }
980 done:
981  sdev->hostdata = rport->dd_data;
982 
983  return 0;
984 }
985 
986 u32
987 bfad_im_supported_speeds(struct bfa_s *bfa)
988 {
989  struct bfa_ioc_attr_s *ioc_attr;
990  u32 supported_speed = 0;
991 
992  ioc_attr = kzalloc(sizeof(struct bfa_ioc_attr_s), GFP_KERNEL);
993  if (!ioc_attr)
994  return 0;
995 
996  bfa_ioc_get_attr(&bfa->ioc, ioc_attr);
997  if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_16GBPS)
998  supported_speed |= FC_PORTSPEED_16GBIT | FC_PORTSPEED_8GBIT |
999  FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT;
1000  else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_8GBPS) {
1001  if (ioc_attr->adapter_attr.is_mezz) {
1002  supported_speed |= FC_PORTSPEED_8GBIT |
1003  FC_PORTSPEED_4GBIT |
1004  FC_PORTSPEED_2GBIT | FC_PORTSPEED_1GBIT;
1005  } else {
1006  supported_speed |= FC_PORTSPEED_8GBIT |
1007  FC_PORTSPEED_4GBIT |
1008  FC_PORTSPEED_2GBIT;
1009  }
1010  } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_4GBPS) {
1011  supported_speed |= FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
1012  FC_PORTSPEED_1GBIT;
1013  } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_10GBPS) {
1014  supported_speed |= FC_PORTSPEED_10GBIT;
1015  }
1016  kfree(ioc_attr);
1017  return supported_speed;
1018 }
1019 
1020 void
1021 bfad_fc_host_init(struct bfad_im_port_s *im_port)
1022 {
1023  struct Scsi_Host *host = im_port->shost;
1024  struct bfad_s *bfad = im_port->bfad;
1025  struct bfad_port_s *port = im_port->port;
1026  char symname[BFA_SYMNAME_MAXLEN];
1027  struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(&bfad->bfa);
1028 
1029  fc_host_node_name(host) =
1030  cpu_to_be64((bfa_fcs_lport_get_nwwn(port->fcs_port)));
1031  fc_host_port_name(host) =
1032  cpu_to_be64((bfa_fcs_lport_get_pwwn(port->fcs_port)));
1033  fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
1034 
1035  fc_host_supported_classes(host) = FC_COS_CLASS3;
1036 
1037  memset(fc_host_supported_fc4s(host), 0,
1038  sizeof(fc_host_supported_fc4s(host)));
1039  if (supported_fc4s & BFA_LPORT_ROLE_FCP_IM)
1040  /* For FCP type 0x08 */
1041  fc_host_supported_fc4s(host)[2] = 1;
1042  /* For fibre channel services type 0x20 */
1043  fc_host_supported_fc4s(host)[7] = 1;
1044 
1045  strncpy(symname, bfad->bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
1046  BFA_SYMNAME_MAXLEN);
1047  sprintf(fc_host_symbolic_name(host), "%s", symname);
1048 
1049  fc_host_supported_speeds(host) = bfad_im_supported_speeds(&bfad->bfa);
1050  fc_host_maxframe_size(host) = fcport->cfg.maxfrsize;
1051 }
1052 
1053 static void
1054 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
1055 {
1056  struct fc_rport_identifiers rport_ids;
1057  struct fc_rport *fc_rport;
1058  struct bfad_itnim_data_s *itnim_data;
1059 
1060  rport_ids.node_name =
1061  cpu_to_be64(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
1062  rport_ids.port_name =
1063  cpu_to_be64(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1064  rport_ids.port_id =
1065  bfa_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
1066  rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
1067 
1068  itnim->fc_rport = fc_rport =
1069  fc_remote_port_add(im_port->shost, 0, &rport_ids);
1070 
1071  if (!fc_rport)
1072  return;
1073 
1074  fc_rport->maxframe_size =
1075  bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
1076  fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
1077 
1078  itnim_data = fc_rport->dd_data;
1079  itnim_data->itnim = itnim;
1080 
1081  rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1082 
1083  if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1084  fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1085 
1086  if ((fc_rport->scsi_target_id != -1)
1087  && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1088  itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1089 
1090  itnim->channel = fc_rport->channel;
1091 
1092  return;
1093 }
1094 
1095 /*
1096  * Work queue handler using FC transport service
1097 * Context: kernel
1098  */
1099 static void
1100 bfad_im_itnim_work_handler(struct work_struct *work)
1101 {
1102  struct bfad_itnim_s *itnim = container_of(work, struct bfad_itnim_s,
1103  itnim_work);
1104  struct bfad_im_s *im = itnim->im;
1105  struct bfad_s *bfad = im->bfad;
1106  struct bfad_im_port_s *im_port;
1107  unsigned long flags;
1108  struct fc_rport *fc_rport;
1109  wwn_t wwpn;
1110  u32 fcid;
1111  char wwpn_str[32], fcid_str[16];
1112 
1113  spin_lock_irqsave(&bfad->bfad_lock, flags);
1114  im_port = itnim->im_port;
1115  bfa_trc(bfad, itnim->state);
1116  switch (itnim->state) {
1117  case ITNIM_STATE_ONLINE:
1118  if (!itnim->fc_rport) {
1119  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1120  bfad_im_fc_rport_add(im_port, itnim);
1121  spin_lock_irqsave(&bfad->bfad_lock, flags);
1122  wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1123  fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1124  wwn2str(wwpn_str, wwpn);
1125  fcid2str(fcid_str, fcid);
1126  list_add_tail(&itnim->list_entry,
1127  &im_port->itnim_mapped_list);
1128  BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1129  "ITNIM ONLINE Target: %d:0:%d "
1130  "FCID: %s WWPN: %s\n",
1131  im_port->shost->host_no,
1132  itnim->scsi_tgt_id,
1133  fcid_str, wwpn_str);
1134  } else {
1135  printk(KERN_WARNING
1136  "%s: itnim %llx is already in online state\n",
1137  __func__,
1138  bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1139  }
1140 
1141  break;
1142  case ITNIM_STATE_OFFLINE_PENDING:
1143  itnim->state = ITNIM_STATE_OFFLINE;
1144  if (itnim->fc_rport) {
1145  fc_rport = itnim->fc_rport;
1146  ((struct bfad_itnim_data_s *)
1147  fc_rport->dd_data)->itnim = NULL;
1148  itnim->fc_rport = NULL;
1149  if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1150  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1151  fc_rport->dev_loss_tmo =
1152  bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1153  fc_remote_port_delete(fc_rport);
1154  spin_lock_irqsave(&bfad->bfad_lock, flags);
1155  }
1156  wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1157  fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1158  wwn2str(wwpn_str, wwpn);
1159  fcid2str(fcid_str, fcid);
1160  list_del(&itnim->list_entry);
1161  BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1162  "ITNIM OFFLINE Target: %d:0:%d "
1163  "FCID: %s WWPN: %s\n",
1164  im_port->shost->host_no,
1165  itnim->scsi_tgt_id,
1166  fcid_str, wwpn_str);
1167  }
1168  break;
1169  case ITNIM_STATE_FREE:
1170  if (itnim->fc_rport) {
1171  fc_rport = itnim->fc_rport;
1172  ((struct bfad_itnim_data_s *)
1173  fc_rport->dd_data)->itnim = NULL;
1174  itnim->fc_rport = NULL;
1175  if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1176  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1177  fc_rport->dev_loss_tmo =
1178  bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1179  fc_remote_port_delete(fc_rport);
1180  spin_lock_irqsave(&bfad->bfad_lock, flags);
1181  }
1182  list_del(&itnim->list_entry);
1183  }
1184 
1185  kfree(itnim);
1186  break;
1187  default:
1188  WARN_ON(1);
1189  break;
1190  }
1191 
1192  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1193 }
1194 
1195 /*
1196  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1197  */
1198 static int
1199 bfad_im_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1200 {
1201  struct bfad_im_port_s *im_port =
1202  (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1203  struct bfad_s *bfad = im_port->bfad;
1204  struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1205  struct bfad_itnim_s *itnim;
1206  struct bfa_ioim_s *hal_io;
1207  unsigned long flags;
1208  int rc;
1209  int sg_cnt = 0;
1210  struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1211 
1212  rc = fc_remote_port_chkready(rport);
1213  if (rc) {
1214  cmnd->result = rc;
1215  done(cmnd);
1216  return 0;
1217  }
1218 
1219  if (bfad->bfad_flags & BFAD_EEH_BUSY) {
1220  if (bfad->bfad_flags & BFAD_EEH_PCI_CHANNEL_IO_PERM_FAILURE)
1221  cmnd->result = DID_NO_CONNECT << 16;
1222  else
1223  cmnd->result = DID_REQUEUE << 16;
1224  done(cmnd);
1225  return 0;
1226  }
1227 
1228  sg_cnt = scsi_dma_map(cmnd);
1229  if (sg_cnt < 0)
1230  return SCSI_MLQUEUE_HOST_BUSY;
1231 
1232  cmnd->scsi_done = done;
1233 
1234  spin_lock_irqsave(&bfad->bfad_lock, flags);
1235  if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1236  printk(KERN_WARNING
1237  "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1238  bfad->inst_no, cmnd, cmnd->cmnd[0]);
1239  cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1240  goto out_fail_cmd;
1241  }
1242 
1243 
1244  itnim = itnim_data->itnim;
1245  if (!itnim) {
1246  cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1247  goto out_fail_cmd;
1248  }
1249 
1250  hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1251  itnim->bfa_itnim, sg_cnt);
1252  if (!hal_io) {
1253  printk(KERN_WARNING "hal_io failure\n");
1254  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1255  scsi_dma_unmap(cmnd);
1256  return SCSI_MLQUEUE_HOST_BUSY;
1257  }
1258 
1259  cmnd->host_scribble = (char *)hal_io;
1260  bfa_ioim_start(hal_io);
1261  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1262 
1263  return 0;
1264 
1265 out_fail_cmd:
1266  spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1267  scsi_dma_unmap(cmnd);
1268  if (done)
1269  done(cmnd);
1270 
1271  return 0;
1272 }
1273 
1274 static DEF_SCSI_QCMD(bfad_im_queuecommand)
1275 
1276 void
1277 bfad_rport_online_wait(struct bfad_s *bfad)
1278 {
1279  int i;
1280  int rport_delay = 10;
1281 
1282  for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1283  && i < bfa_linkup_delay; i++) {
1284  set_current_state(TASK_UNINTERRUPTIBLE);
1285  schedule_timeout(HZ);
1286  }
1287 
1288  if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1289  rport_delay = rport_delay < bfa_linkup_delay ?
1290  rport_delay : bfa_linkup_delay;
1291  for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1292  && i < rport_delay; i++) {
1293  set_current_state(TASK_UNINTERRUPTIBLE);
1294  schedule_timeout(HZ);
1295  }
1296 
1297  if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE)) {
1298  set_current_state(TASK_UNINTERRUPTIBLE);
1299  schedule_timeout(rport_delay * HZ);
1300  }
1301  }
1302 }
1303 
1304 int
1305 bfad_get_linkup_delay(struct bfad_s *bfad)
1306 {
1307  u8 nwwns = 0;
1308  wwn_t wwns[BFA_PREBOOT_BOOTLUN_MAX];
1309  int linkup_delay;
1310 
1311  /*
1312  * Querying for the boot target port wwns
1313  * -- read from boot information in flash.
1314  * If nwwns > 0 => boot over SAN and set linkup_delay = 30
1315  * else => local boot machine set linkup_delay = 0
1316  */
1317 
1318  bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, wwns);
1319 
1320  if (nwwns > 0)
1321  /* If Boot over SAN set linkup_delay = 30sec */
1322  linkup_delay = 30;
1323  else
1324  /* If local boot; no linkup_delay */
1325  linkup_delay = 0;
1326 
1327  return linkup_delay;
1328 }
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